The following guideline describes the various physical, cognitive, emotional, and social developmental changes and milestones to be expected during the first year of life.
It is of utmost importance to remember that the timeline is approximate, not absolute. Each child develops at his or her own pace, and some stages may occur earlier or later.

Differences between the timing in this guideline and your child may exist, but do not necessarily mean that there is a problem with your baby's development. Any concerns, however, should be discussed with your physician.

Physical

• Growth
  • Gains 1 lb/month
• Movement and Activity
  • No head lag when pulled to sitting position from lying on back
  • Reaches and grasps objects, brings to them to mouth while lying on back
  • Holds objects indefinitely
  • Stands when held
  • Plays with hands and feet

Social/Emotional

• Shows displeasure at withdrawal of social contact
• Excited at the sight of food
• Communication
  • Remains silent while others speak, then vocalizes

5 MONTHS OLD

Physical

• Movement and Activity
  • Transfers object from hand to mouth to opposite hand
  • Begins to teethe

Social/Emotional

• Plays with mirror image
• Communication
  • Imitates speaker
  • Sing-song quality to voice
  • Makes raspberry sound